The 1200 Series Ovate Beehive Valve Spring Set replace for Replacement Part # PAC-1219. 340 lbs/in Spring Rate, 1.100 in Coil Bind, 1.307 in OD.
Directly installation. 1.Use compression tester to hold up your valves. 2 Remove the top fixing screws by pull off the retainer, and then use the little magnet to grab the keepers, release the springs. 3. Place new springs in position and install back all the parts.
(FITMENT) Compatible with GM LS Series engines 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, Model LS1 LS2 LS3 LS4 LS6 LS7 LS9 LSA LSJ LSX LSY LQ4 LQ9 LM7.
The Valve Spring Set prevents both valve float and valve bounce. Choose them if you're upgrading camshafts grind up to 625'' lift at the valve or doing engine rebuilds.